You can change the text and icon for the Follow button on your Spaces.
However, the changes are effective for all the spaces, you cannot have different button texts for different Spaces yet.
Changing Follow Button Text
To change the default text go to Spaces > Settings > Engagement
Type in your desired text.
Hit Save Changes.
Now, visit any space on your site
Changing Follow Button Icons
Coming soon in Spaces Engine 1.1.8
You will be able to pick and change the icon for both states here.
We hope you enjoy this new feature, if you have any further questions please reach out to email@example.com